Luna International
Luna AB, 1988
Buku Teks
Krar, Stephen F., author
McGraw-Hill, 1984
Buku Teks
Krar, Stephen F., author
McGraw-Hill, 1986
Buku Teks
Krar, Stephen F., author
McGraw-Hill, 1976
Buku Teks
Krar, Stephen F., author
Glencoe, 1990
Buku Teks